Please log in here to access all benefits, including promotional discounts and faster checkouts.

Carmex Thread Turning Internal Insert - UN (UNC,UNF,UNEF,UNS) - Right Hand - 16IR20UN2MBMA

Carmex Thread Turning Internal Insert - UN (UNC,UNF,UNEF,UNS) - Right Hand - 16IR20UN2MBMA

SKU:16IR20UN2MBMA

The Carmex Thread Turning Internal Insert is a precision tool for internal threading on right-hand UNC, UNF, UNEF, and UNS threads. Engineers, machinists, buyers, and technicians rely on its cons... Read more ↓
P
M
K
S
H
Thread TypeInternal
Thread DirectionRight Hand
Thread FormUN (UNC UNF UNEF UNS)
Pitch20
Insert Size16
GradeBMA
Download Cutting Data
£16.11
Prices shown ex. VAT
5 days estimated lead time — subject to availability
View Other Sizes →
Free delivery over £50 ex VAT
Secure checkout
14-day returns
30+ years expertise
Klarna
Pay in 3 interest-free instalments. No extra cost if paid on time. 18+ only.
Learn more about Klarna
Speak to our team
01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

The Carmex Thread Turning Internal Insert is a precision tool for internal threading on right-hand UNC, UNF, UNEF, and UNS threads. Engineers, machinists, buyers, and technicians rely on its consistent performance to deliver accurate threads in a variety of materials and applications.

As part of Carmex's globally recognized range of thread turning inserts, this laydown triangular design provides a versatile solution for the majority of thread standards used today, from basic jobs to demanding applications.

  • Broad thread standards compatibility: Supports right-hand UNC, UNF, UNEF, and UNS threads, reducing the need for multiple inserts and simplifying setup.
  • Laydown triangular geometry for stability: The triangular laydown form helps keep the insert centered during cutting, delivering consistent threads and smoother operation.
  • Versatile performance across applications: Designed to handle a wide range of tasks—from simple to highly demanding—so you can rely on one insert family for many jobs and minimize tool changes.

This insert helps streamline threading workflows, improves overall productivity, and delivers reliable, accurate internal threads across common thread standards. Its robust design supports repeatable results on diverse materials, reducing downtime and inventory complexity while ensuring confidence in every pass.

Thread Type Internal
Thread Direction Right Hand
Thread Form UN (UNC UNF UNEF UNS)
Pitch 20
Insert Size 16
Grade BMA

What time are Protool open?

We are open Monday to Friday between 8:30am and 5pm.

Do you offer Free Next Day delivery?

Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.

We also offer the following:

  • Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
  • DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
  • Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
  • DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.

For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.

*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.

★★★★★
Nice experience staff are very helpful and interested...
Staff are very helpful and interested in providing a good service making us the customer feel valued.
Bill
★★★★★
first place we look
honest about stock and prices are competitive.
Phil
★★★★★
Polite and helpful
Staff are very helpful and polite.Goods that were in stock were dispatched same day and back orders were quick in coming through .
Graham
★★★★★
Buying experience
Phone requests are handled quickly and without any fuss. The website is easy to use and straightforward to order from. It’s especially helpful that it shows real‑time availability, so we don’t need to call to confirm whether parts will arrive.
Jeremy

Full Range: Carmex Thread Turning Internal Inserts - Multitooth - Unified - Right Hand

View full collection →

You are viewing 16IR20UN2MBMA. Click any other SKU to view its full details.

Product SKUThread TypeThread DirectionThread FormPitchInsert SizeGradePriceStock Order
16IR12UN2MBMA InternalRight HandUN (UNC UNF UNEF UNS)1216BMA£15.82 In Stock
16IR14UN2MBMA InternalRight HandUN (UNC UNF UNEF UNS)1416BMA£16.11 5 days
16IR16UN2MBMA InternalRight HandUN (UNC UNF UNEF UNS)1616BMA£15.82 5 days
16IR18UN2MBMA InternalRight HandUN (UNC UNF UNEF UNS)1816BMA£16.11 5 days
16IR20UN2MBMA ViewingInternalRight HandUN (UNC UNF UNEF UNS)2016BMA£16.11 5 days
22IR12UN2MBMA InternalRight HandUN (UNC UNF UNEF UNS)1222BMA£25.52 5 days
22IR12UN3MBMA InternalRight HandUN (UNC UNF UNEF UNS)1222BMA£25.52 5 days
22IR16UN3MBMA InternalRight HandUN (UNC UNF UNEF UNS)1622BMA£25.08 5 days
27IR8UN2MBMA InternalRight HandUN (UNC UNF UNEF UNS)827BMA£32.72 5 days

Complete Your Project

with tools we think you'll like